<html>
  <head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <title>小黑记事本</title>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <meta name="robots" content="noindex, nofollow" />
    <meta name="googlebot" content="noindex, nofollow" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link rel="stylesheet" type="text/css" href="./css/Bookindex.css" />
  </head>

  <body>
    <!-- 主体区域 -->
    <section id="todoapp">
      <!-- 输入框 -->
      <header class="header">
        <h1>小黑记事本</h1>
        <input
          autofocus="autofocus"
          autocomplete="off"
          placeholder="请输入任务"
          class="new-todo"
          v-model="content"
          @keyup.enter="addMsg"
        />
      </header>
      <!-- 列表区域 -->
      <section class="main">
        <ul class="todo-list" v-for="(item,index) in msg">
          <li class="todo">
            <div class="view">
              <span class="index">{{index+1}}</span> <label>{{item}}</label>
              <button class="destroy" @click="del(index)"></button>
            </div>
          </li>
        </ul>
      </section>
      <!-- 统计和清空 -->
      <footer class="footer">
        <span class="todo-count"> <strong>{{msg.length}}</strong> items left </span>
        <button class="clear-completed" @click="cls">
          Clear
        </button>
      </footer>
    </section>
    <!-- 底部 -->
    <footer class="info">
      <p>
        <a href="http://www.baidu.com"
          ><img src="./img/logo.png" alt=""
        /></a>
      </p>
    </footer>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="../js/vue.js"></script>

  </body>
<script>
  let app=new Vue({
    el:"#todoapp",
    data:{
      msg:["唱","跳" ,"rap" ,"篮球"],
      content:"",
    },
   methods:{
      addMsg(){
        this.msg.push(this.content)
      },
     del(index){
        this.msg.splice(index,1)
     },
     cls(){
        this.msg=[];
     }
    }
  })
</script>
</html>
